Square Enix has announced a follow up to Guardian Cross entitled Guardian Codex, which will be released worldwide for iOS and Android later this fall. Players will be able to work together with up to three other players in this fully-3D mobile RPG. By pre-registering for the game via Facebook or Twitter, you'll be able to nab 60,000 Codex Credits, which ought to prove useful. Check out the announcement trailer and synopsis below.

Enter the virtual world of the Codex…

In the year 2030, the world is split between the Empire and the Resistance.

Outmatched by the Empire, the Resistance has nowhere to turn except to send their agents into the "Codex," a virtual reality version of the world from ancient times. As one of their agents, you are sent into the Codex with a vital mission: find the extinct legendary "Guardians."

The Resistance’s goal is to transfer the virtual Guardians into the real world and use them to defeat the Empire. But your journey isn’t as easy as it sounds. Immerse yourself in the world of the Codex to better understand the Guardians and help the Resistance!